For some of these systems, I don’t understand why they are not running openbsd like medical equipment that should be as secure as possible… And more broadly, most of the world depending on one OS and its environment is only a path for disasters (this one, wanna cry, spying from three letters agencies…)
I totally disagree with the quote from hackernews. Having the option to use sqlite is nice to test it, but going with postgresql or mariadb allows you to have better performance if you use rdbms. Also, packaging with containers allows to have one standardized image for support if some third party packaging (from a distro repo) is bugging to test it further. To me, a good gui really depends on what service is provided. For kanidm (IAM), I don’t care this much of a web admin panel, the cli is really intuitive and if you need some graph views of your users, you can generate some diagram files. Considering OIDC/LDAP, I’d rather have OIDC implemented for two reasons : I can point my users to the (really minimalist) kanidm ui where they have a button for each app allowed. Also, the login informations are only stored in kanidm, no spreading of login password.
I saw a comment about not needing to rely on many third services but I partly disagree with it. Using nextcloud as a mixed example, using elastic search for full text search is better than reimplementing it, but the notify_push should not be as separated as it is (it is here because I understood, apache-php and websockets does not mix well).
All in all, the main criterias for me are :